:root {
  --bg: #f6f9ff;
  --bg-soft: #edf5ff;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-solid: #ffffff;
  --surface-strong: #eaf2ff;
  --line: rgba(26, 86, 219, 0.12);
  --line-strong: rgba(26, 86, 219, 0.22);
  --text: #0f172a;
  --muted: #52607a;
  --primary: #2368ff;
  --primary-deep: #0f3dbf;
  --primary-soft: rgba(35, 104, 255, 0.1);
  --glow: rgba(79, 149, 255, 0.28);
  --shadow-lg: 0 30px 80px rgba(30, 64, 175, 0.12);
  --shadow-md: 0 20px 48px rgba(30, 64, 175, 0.08);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --heading-font: "HarmonyOS Sans SC", "Alibaba PuHuiTi 3.0", "PingFang SC", "Microsoft YaHei", sans-serif;
  --body-font: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 0%, rgba(65, 138, 255, 0.18), transparent 26%),
    radial-gradient(circle at 88% 12%, rgba(130, 195, 255, 0.18), transparent 24%),
    linear-gradient(180deg, #f5f9ff 0%, #eef5ff 28%, #fbfdff 65%, #f6faff 100%);
  font-family: var(--body-font);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.42;
  background-image:
    linear-gradient(rgba(34, 99, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 99, 255, 0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.42), transparent 80%);
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  backdrop-filter: blur(22px);
  background: rgba(248, 251, 255, 0.76);
  border-bottom: 1px solid rgba(131, 161, 214, 0.22);
  box-shadow: 0 10px 30px rgba(148, 163, 184, 0.08);
}

.navbar {
  padding: 1rem 0;
}

.navbar-toggler {
  border: 1px solid rgba(37, 99, 235, 0.16);
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 0.18rem rgba(37, 99, 235, 0.12);
}

.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%2815,23,42,0.88%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 18px;
  background: linear-gradient(135deg, #42c6ff 0%, #2563ff 58%, #1732b8 100%);
  color: #fff;
  font-weight: 800;
  box-shadow: 0 20px 45px rgba(37, 99, 235, 0.28);
}

.brand-name,
.hero-title,
.section-heading h2,
.value-panel h3,
.feature-card h3,
.scenario-card h3,
.qr-meta h3,
.deploy-panel h3,
.process-lane-head h3,
.process-step h4 {
  font-family: var(--heading-font);
}

.brand-name {
  display: block;
  font-size: 1.06rem;
  line-height: 1.18;
}

.brand-subtitle {
  color: #61708d;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.navbar .nav-link {
  color: rgba(15, 23, 42, 0.76);
  font-weight: 600;
  padding-inline: 0.9rem;
}

.navbar .nav-link.active,
.navbar .nav-link:hover {
  color: var(--primary-deep);
}

.btn {
  border-radius: 999px;
  font-weight: 700;
}

.btn-accent {
  border: none;
  color: #fff;
  background: linear-gradient(135deg, #37b8ff 0%, #2563ff 62%, #1d4ed8 100%);
  box-shadow: 0 16px 34px rgba(37, 99, 235, 0.22);
}

.btn-accent:hover,
.btn-accent:focus {
  color: #fff;
  background: linear-gradient(135deg, #56c5ff 0%, #3771ff 62%, #2056e2 100%);
}

.btn-outline-ice {
  border: 1px solid rgba(26, 86, 219, 0.18);
  color: var(--primary-deep);
  background: rgba(255, 255, 255, 0.66);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.4);
}

.btn-outline-ice:hover,
.btn-outline-ice:focus {
  color: var(--primary-deep);
  border-color: rgba(26, 86, 219, 0.26);
  background: rgba(255, 255, 255, 0.92);
}

.hero-section {
  position: relative;
  padding: 6.5rem 0 4.5rem;
  overflow: hidden;
}

.hero-section::before,
.hero-section::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.hero-section::before {
  width: 520px;
  height: 520px;
  top: -180px;
  right: -120px;
  background: radial-gradient(circle, rgba(65, 138, 255, 0.22) 0%, rgba(65, 138, 255, 0) 70%);
}

.hero-section::after {
  width: 480px;
  height: 480px;
  left: -180px;
  bottom: -180px;
  background: radial-gradient(circle, rgba(86, 190, 255, 0.18) 0%, rgba(86, 190, 255, 0) 74%);
}

.hero-shell {
  position: relative;
}

.eyebrow {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}

.eyebrow span,
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.48rem 0.92rem;
  border-radius: 999px;
  border: 1px solid rgba(37, 99, 235, 0.14);
  background: rgba(255, 255, 255, 0.74);
  color: var(--primary-deep);
  font-size: 0.88rem;
  letter-spacing: 0.02em;
  box-shadow: 0 10px 30px rgba(148, 163, 184, 0.08);
}

.hero-copy {
  max-width: 42rem;
}

.hero-brandline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 0.85rem;
}

.hero-brand-cn {
  color: var(--primary-deep);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.hero-brand-en {
  color: var(--primary);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-meta {
  margin-bottom: 1.1rem;
  color: #385174;
  font-size: 0.98rem;
  line-height: 1.8;
}

.hero-title,
.section-heading h2,
.value-panel h3,
.deploy-panel h3,
.process-lane-head h3,
.process-step h4 {
  text-wrap: balance;
}

.hero-title {
  margin-bottom: 1.3rem;
  font-size: clamp(2.7rem, 5.6vw, 5.2rem);
  font-weight: 850;
  line-height: 1.14;
  letter-spacing: -0.04em;
  max-width: 11.8ch;
}

.hero-title-line {
  display: block;
}

.hero-title-line + .hero-title-line {
  margin-top: 0.14em;
}

.hero-title-line-accent {
  background: linear-gradient(90deg, #16315d 0%, #2154cf 44%, #4f9fff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-desc {
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.9;
  max-width: 39rem;
  margin-bottom: 2rem;
}

.hero-actions {
  margin-bottom: 1.7rem;
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.4rem;
  color: #31425f;
}

.hero-trust span {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-trust i {
  color: var(--primary);
}

.hero-visual {
  position: relative;
  padding: 1.6rem;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.82);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(240, 247, 255, 0.92)),
    radial-gradient(circle at top right, rgba(82, 157, 255, 0.18), transparent 34%);
  box-shadow: var(--shadow-lg);
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: 1rem;
  border-radius: calc(var(--radius-xl) - 12px);
  border: 1px solid rgba(81, 129, 255, 0.08);
  pointer-events: none;
}

.hero-visual-head {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 1.3rem;
  color: #385174;
  font-weight: 700;
}

.hero-visual-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, #5ce1ff, #2563ff);
  box-shadow: 0 0 0 8px rgba(37, 99, 235, 0.1);
}

.hub-visual {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1.12fr 1fr;
  grid-template-rows: auto 1fr auto;
  gap: 0.9rem;
  padding: 0.15rem;
}

.hub-visual::before,
.hub-visual::after {
  content: "";
  position: absolute;
  inset: 20% 14%;
  border-radius: 32px;
  pointer-events: none;
}

.hub-visual::before {
  border: 1px dashed rgba(37, 99, 235, 0.14);
}

.hub-visual::after {
  background:
    linear-gradient(90deg, rgba(37, 99, 235, 0.12), rgba(37, 99, 235, 0)) center/60% 1px no-repeat,
    linear-gradient(180deg, rgba(37, 99, 235, 0.12), rgba(37, 99, 235, 0)) center/1px 60% no-repeat;
}

.hub-node,
.hub-center {
  position: relative;
  padding: 1rem;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(37, 99, 235, 0.1);
  box-shadow: 0 10px 30px rgba(148, 163, 184, 0.08);
}

.hub-node {
  min-height: 118px;
}

.hub-node i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 0.8rem;
  border-radius: 14px;
  background: rgba(35, 104, 255, 0.08);
  color: var(--primary-deep);
  font-size: 1.1rem;
}

.hub-node strong {
  display: block;
  margin-bottom: 0.28rem;
  font-size: 1rem;
}

.hub-node span {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.55;
}

.hub-node-1 {
  grid-column: 1;
  grid-row: 1;
}

.hub-node-2 {
  grid-column: 3;
  grid-row: 1;
}

.hub-node-3 {
  grid-column: 1;
  grid-row: 3;
}

.hub-node-4 {
  grid-column: 3;
  grid-row: 3;
}

.hub-center {
  grid-column: 2;
  grid-row: 2;
  display: flex;
  min-height: 240px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  text-align: center;
}

.hub-center::before {
  content: "";
  position: absolute;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(119, 194, 255, 0.34) 0%, rgba(119, 194, 255, 0.08) 42%, rgba(119, 194, 255, 0) 70%),
    conic-gradient(from 120deg, rgba(53, 120, 255, 0.14), rgba(53, 120, 255, 0.02), rgba(53, 120, 255, 0.14));
  animation: floatPulse 8s ease-in-out infinite;
}

.hub-center small,
.integration-col small {
  display: block;
  margin-bottom: 0.65rem;
  color: #5f7596;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hub-center strong {
  position: relative;
  z-index: 1;
  display: block;
  margin-bottom: 0.35rem;
  font-size: 4rem;
  line-height: 1;
  color: var(--primary-deep);
}

.hub-center p {
  position: relative;
  z-index: 1;
  margin: 0;
  max-width: 16rem;
  color: var(--muted);
  line-height: 1.7;
}

.hero-legend {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.hero-legend span {
  display: inline-flex;
  align-items: center;
  padding: 0.48rem 0.85rem;
  border-radius: 999px;
  background: rgba(35, 104, 255, 0.08);
  color: #26446d;
  font-weight: 600;
}

.hero-stat-strip {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 1rem;
}

.hero-stat {
  padding: 1rem 1.05rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(37, 99, 235, 0.1);
}

.hero-stat strong {
  display: block;
  margin-bottom: 0.32rem;
  font-size: 1.02rem;
}

.hero-stat span {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.62;
}

.content-section {
  position: relative;
  padding: 5.8rem 0;
}

.section-tint {
  background:
    linear-gradient(180deg, rgba(236, 244, 255, 0.92), rgba(248, 251, 255, 0.98)),
    radial-gradient(circle at top right, rgba(106, 170, 255, 0.14), transparent 28%);
  border-top: 1px solid rgba(170, 196, 234, 0.3);
  border-bottom: 1px solid rgba(170, 196, 234, 0.3);
}

.section-heading {
  max-width: 46rem;
  margin: 0 auto 3rem;
  text-align: center;
}

.section-heading h2 {
  margin: 1rem auto;
  max-width: 18ch;
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.03em;
}

.section-heading p {
  margin: 0 auto;
  max-width: 43rem;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.88;
}

.value-panel,
.feature-card,
.scenario-card,
.deploy-panel,
.integration-board,
.process-shell,
.qr-card {
  height: 100%;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(37, 99, 235, 0.1);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(246, 250, 255, 0.94)),
    radial-gradient(circle at top right, rgba(107, 170, 255, 0.12), transparent 28%);
  box-shadow: var(--shadow-md);
}

.value-panel,
.feature-card,
.scenario-card,
.deploy-panel {
  padding: 1.8rem;
}

.value-badge,
.deploy-pill,
.feature-tag,
.scenario-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary-deep);
  font-size: 0.86rem;
  font-weight: 700;
}

.value-badge {
  margin-bottom: 1rem;
}

.value-panel h3,
.deploy-panel h3 {
  margin-bottom: 1rem;
  font-size: 1.42rem;
  line-height: 1.46;
}

.value-panel-accent,
.deploy-panel-contrast {
  background:
    linear-gradient(180deg, rgba(233, 242, 255, 0.98), rgba(244, 248, 255, 0.98)),
    radial-gradient(circle at top right, rgba(56, 139, 255, 0.16), transparent 32%);
}

.value-badge-accent,
.deploy-pill-contrast {
  background: linear-gradient(135deg, rgba(55, 184, 255, 0.18), rgba(37, 99, 235, 0.16));
}

.value-list {
  display: grid;
  gap: 0.9rem;
  padding-left: 1rem;
  margin: 0;
  color: #24344f;
  line-height: 1.8;
}

.process-shell {
  padding: 1.7rem;
}

.process-caption {
  margin-bottom: 1.25rem;
  color: var(--muted);
  line-height: 1.82;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.process-lane {
  position: relative;
  padding: 1.25rem;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(37, 99, 235, 0.1);
  box-shadow: 0 12px 34px rgba(148, 163, 184, 0.07);
}

.process-lane:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -0.78rem;
  width: 1.56rem;
  height: 2px;
  background: linear-gradient(90deg, rgba(37, 99, 235, 0.2), rgba(37, 99, 235, 0.46));
}

.process-lane:not(:last-child)::before {
  content: "";
  position: absolute;
  top: calc(50% - 4px);
  right: -0.78rem;
  width: 8px;
  height: 8px;
  border-top: 2px solid rgba(37, 99, 235, 0.46);
  border-right: 2px solid rgba(37, 99, 235, 0.46);
  transform: rotate(45deg);
}

.process-lane-head {
  margin-bottom: 1rem;
}

.process-lane-kicker {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.75rem;
  margin-bottom: 0.8rem;
  border-radius: 999px;
  background: rgba(35, 104, 255, 0.08);
  color: var(--primary-deep);
  font-size: 0.82rem;
  font-weight: 700;
}

.process-lane-head h3 {
  margin-bottom: 0.9rem;
  font-size: 1.2rem;
  line-height: 1.36;
}

.process-artifacts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.process-artifacts span {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0.48rem 0.72rem;
  border-radius: 999px;
  background: rgba(35, 104, 255, 0.07);
  color: #24416d;
  font-size: 0.86rem;
  font-weight: 600;
}

.process-lane-steps {
  display: grid;
  gap: 0.8rem;
}

.process-step {
  padding: 1rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(37, 99, 235, 0.1);
}

.process-step-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.8rem;
}

.process-step-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 52px;
  padding: 0.42rem 0.8rem;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(70, 190, 255, 0.18), rgba(37, 99, 235, 0.16));
  color: var(--primary-deep);
  font-weight: 800;
}

.process-step-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 14px;
  background: rgba(35, 104, 255, 0.08);
  color: var(--primary-deep);
  font-size: 1rem;
}

.process-step h4 {
  margin-bottom: 0.55rem;
  font-size: 1.02rem;
  line-height: 1.38;
}

.process-step p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.72;
}

.feature-card,
.scenario-card,
.deploy-panel,
.value-panel {
  transition: transform 0.26s ease, box-shadow 0.26s ease;
}

.feature-card:hover,
.scenario-card:hover,
.deploy-panel:hover,
.value-panel:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 54px rgba(37, 99, 235, 0.12);
}

.feature-icon {
  width: 58px;
  height: 58px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(77, 191, 255, 0.18), rgba(37, 99, 235, 0.16));
  color: var(--primary-deep);
  font-size: 1.45rem;
}

.feature-tag,
.scenario-pill {
  margin-bottom: 1rem;
}

.feature-card h3,
.scenario-card h3 {
  margin-bottom: 0.7rem;
  font-size: 1.16rem;
  line-height: 1.42;
}

.feature-card p,
.scenario-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.74;
}

.integration-points,
.contact-points {
  display: grid;
  gap: 0.8rem;
  margin-top: 1.7rem;
}

.integration-points span,
.contact-points span {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: #31425f;
  line-height: 1.7;
}

.integration-points i,
.contact-points i {
  color: var(--primary);
}

.integration-board {
  padding: 1.4rem;
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 1rem;
  align-items: stretch;
}

.integration-col {
  padding: 1.2rem;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(37, 99, 235, 0.1);
}

.integration-col strong {
  display: block;
  margin-bottom: 0.95rem;
  font-size: 1.08rem;
  line-height: 1.4;
}

.integration-col span {
  display: block;
  padding: 0.68rem 0.85rem;
  margin-top: 0.55rem;
  border-radius: 16px;
  background: rgba(35, 104, 255, 0.07);
  color: #24416d;
}

.integration-col-focus {
  background: linear-gradient(180deg, rgba(235, 244, 255, 1), rgba(247, 251, 255, 1));
}

.integration-flow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: rgba(37, 99, 235, 0.48);
  font-size: 1.4rem;
}

.contact-section {
  padding-bottom: 6rem;
}

.contact-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 420px);
  gap: 1.4rem;
  padding: 1.6rem;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(37, 99, 235, 0.1);
  background:
    linear-gradient(180deg, rgba(235, 244, 255, 0.88), rgba(255, 255, 255, 0.92)),
    radial-gradient(circle at top right, rgba(86, 190, 255, 0.14), transparent 30%);
  box-shadow: var(--shadow-lg);
}

.contact-copy h2 {
  margin: 1rem 0;
  max-width: 15ch;
  font-size: clamp(2rem, 3.6vw, 3rem);
  line-height: 1.16;
}

.contact-copy p {
  color: var(--muted);
  line-height: 1.9;
  margin-bottom: 1.4rem;
}

.qr-card {
  padding: 1.2rem;
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 1.15rem;
  align-items: center;
}

.qr-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
  padding: 1rem;
  border-radius: 28px;
  background: #fff;
  cursor: pointer;
  transition: transform 0.24s ease, box-shadow 0.24s ease;
}

.qr-preview:hover,
.qr-preview:focus-visible {
  transform: translateY(-4px);
  box-shadow: 0 18px 36px rgba(37, 99, 235, 0.18);
}

.qr-preview img {
  width: 100%;
  max-width: 168px;
  height: auto;
}

.qr-meta-head {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.95rem;
  padding: 0.42rem 0.85rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.76);
  color: #31425f;
  font-weight: 600;
}

.qr-meta-head img {
  width: 18px;
  height: 18px;
}

.qr-meta h3 {
  margin-bottom: 0.75rem;
  line-height: 1.36;
}

.qr-meta p {
  color: var(--muted);
  line-height: 1.82;
}

.btn-link {
  color: var(--primary);
  font-weight: 700;
}

.btn-link:hover,
.btn-link:focus {
  color: var(--primary-deep);
}

.faq-accordion .accordion-item {
  border: 1px solid rgba(37, 99, 235, 0.1);
  border-radius: 22px;
  overflow: hidden;
  margin-bottom: 1rem;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 12px 30px rgba(148, 163, 184, 0.06);
}

.faq-accordion .accordion-button,
.faq-accordion .accordion-button:not(.collapsed) {
  color: var(--text);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: none;
  font-weight: 700;
}

.faq-accordion .accordion-body {
  color: var(--muted);
  line-height: 1.85;
}

.site-footer {
  padding: 1.4rem 0 2rem;
  color: #5f7596;
}

.site-footer strong {
  color: var(--text);
  margin-right: 0.55rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links a:hover {
  color: var(--primary-deep);
}

.mobile-wechat-btn {
  position: fixed;
  left: 50%;
  bottom: 1rem;
  transform: translateX(-50%);
  z-index: 1030;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.9rem 1.3rem;
  border: none;
  border-radius: 999px;
  background: linear-gradient(135deg, #4cc6ff, #2563ff);
  color: #fff;
  font-weight: 700;
  box-shadow: 0 18px 36px rgba(37, 99, 235, 0.26);
}

.qr-modal {
  border: 1px solid rgba(37, 99, 235, 0.1);
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(244, 248, 255, 0.98)),
    radial-gradient(circle at top right, rgba(82, 157, 255, 0.18), transparent 28%);
  color: var(--text);
  box-shadow: var(--shadow-lg);
}

.qr-modal .modal-header small {
  color: var(--muted);
}

.qr-modal .modal-body {
  padding: 0 1.5rem 1.5rem;
  text-align: center;
}

.qr-modal .modal-body img {
  max-width: min(86vw, 420px);
  width: 100%;
  padding: 1rem;
  border-radius: 28px;
  background: #fff;
}

.fade-in-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes floatPulse {
  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.05);
  }
}

@media (max-width: 1199.98px) {
  .process-grid,
  .integration-board,
  .contact-shell {
    grid-template-columns: 1fr;
  }

  .process-lane:not(:last-child)::after,
  .process-lane:not(:last-child)::before,
  .integration-flow {
    display: none;
  }

  .hub-visual {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: auto auto auto;
  }

  .hub-center {
    grid-column: 1 / -1;
    grid-row: 2;
    min-height: 210px;
  }

  .hub-node-1,
  .hub-node-2,
  .hub-node-3,
  .hub-node-4 {
    grid-column: auto;
    grid-row: auto;
  }
}

@media (max-width: 991.98px) {
  .hero-section {
    padding-top: 5rem;
  }

  .hero-title {
    font-size: 3.1rem;
  }

  .qr-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 767.98px) {
  .navbar {
    padding: 0.85rem 0;
  }

  .brand-badge {
    width: 44px;
    height: 44px;
    border-radius: 14px;
  }

  .hero-section,
  .content-section {
    padding: 4.4rem 0;
  }

  .hero-title {
    font-size: 2.42rem;
    line-height: 1.16;
    max-width: none;
  }

  .hero-desc,
  .section-heading p,
  .contact-copy p {
    font-size: 1rem;
  }

  .section-heading h2,
  .contact-copy h2 {
    font-size: 2.15rem;
    line-height: 1.18;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-stat-strip {
    grid-template-columns: 1fr;
  }

  .hub-visual,
  .contact-shell,
  .qr-card {
    grid-template-columns: 1fr;
  }

  .hero-visual,
  .value-panel,
  .feature-card,
  .scenario-card,
  .deploy-panel,
  .process-shell,
  .process-lane,
  .integration-board,
  .contact-shell,
  .qr-card {
    border-radius: 24px;
  }

  .hub-center {
    min-height: 180px;
  }

  .hub-center strong {
    font-size: 3.2rem;
  }

  .site-footer {
    padding-bottom: 6rem;
  }

  .qr-modal .modal-body img {
    max-width: min(90vw, 360px);
  }
}